Fayat Group DYNAPAC S100, Operation & Maintenance Manual

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Declaration of “acoustic” conformity (2000/14-EC Directive)
Guaranteed acoustic power calculation. PUBERT -SAS
Outdoor 2000/14 directive
Model S100
Type GXV160
Date 13/12/2016
* Average acoustic power of n lawn-mowers
* Overall standard deviation on values in dB(A):
The overall standard deviation includes the production standard deviation and the measurement
repeatability

production
Overall standard deviation
The repeatability standard deviation is in the order of 0.25 dB (It was assessed by
Pubert during a test campaign, using the same measurement 9 times on a reference
source (Min1510)
* The measurements taken make it possible to define a guaranteed acoustic power of:
Coverage coefficient
Sample
size
Trust
level
95%
Trust
level 20%
2 6.314 3.078
3 2.920 1.886
4 2.353 1.638
5 2.132 1.533
0 2.015 1.476
7 1.943 1.440
B 1.895 1.415
9 1.860 1.397
10 1.833 1.383
15 1.761 1.345
20 1.729 1.328
100 1.690 1.290

1.645 1.280
Guaranteed acoustic power
Sample
N°
serial n°
Laeq 10 LwA in dB(A}

production

repeatability
 global
Factor
C 95%
K Factor
Guaranteed acoustic
power level
1 3001 74.369 20.02 04.30
2 0002 71.887 20.02 91.21
3 0003 72.594 20.02 92.71
93.003 1.26604357
5
0.25 1.2905 2.920 3.768 96.772
Guaranteed LwA in dB(A} 97
Where:
- Lg : guaranteed acoustic power in dB(A),
- L
w
: average acoustic power in dB(A).
- K: K uncertainty, in dB(A),
-

global
:
overall standard deviation
- C: overlap factor.